QUESTION 7 In what pH range will the following titrations have their equivalence

ID: 880206 • Letter: Q

Question

QUESTION 7

In what pH range will the following titrations have their equivalence points?

Weak acid with a strong base

Weak base with strong acid

Strong base with strong acid

pH is greater than 7 at the equivalence

pH is less than 7 at the equivalence point

pH equals 7 at the equivalence point

- A. B. C.

Weak acid with a strong base

- A. B. C.

Weak base with strong acid

- A. B. C.

Strong base with strong acid

pH is greater than 7 at the equivalence

pH is less than 7 at the equivalence point

pH equals 7 at the equivalence point

Solution :-

1) Weak acid with a strong base reaction forms the conjugate base of acid therefore the solution is basic in nature

therefore the pH at equivalence point is greater than 7 therefore correct answer is 'A' pH is greater than 7 at the equivalence

2) Weak base with strong acid reaction forms conjugate acid of the base which has pH less than 7 at equivalence

point

therefore correct answer is option 'B' pH is less than 7 at the equivalence point

3) Strong base with strong acid reaction forms water and neutral salt therefore pH at equivalence point is equal to 7

therefore correct answer is option 'C' pH equals 7 at the equivalence point

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